StealthCoin (XST) is a decentralised, open-source cryptocurrency forked from Novacoin in July 2014. As its name suggests, the project attempts to provide a complete anonymity solution for cryptocurrencies. This is achieved by using a concept called StealthAddress, a cryptographic blockchain obfuscation technique where innumerable destination addresses can be created from each public receiving address; the destination addresses can not be linked to each other or to the public receiving address. Another interesting feature of the cryptocurrency is StealthText, a multi-platform anonymous cryptographic SMS transaction sending technology. StealthCoin has a fair distribution with nearly four hours of low block rewards, a small premine of 1%, and the long-term energy efficiency of proof-of-stake minting. Original announcement.

Source: CryptoID.info. *"Block Height" refers to the total number of completed blocks in the blockchain, while "Difficulty" represents the number of attempts required to find the correct solution and to complete a block of transactions.